104 



RECORD AND RESULTS OF 



Combining the mean of set 1 and set 2 (6.7364) with the angle of set 3, correct- 

 ing the first for torsion and referring it to 39°. 7 Fah., we find 



ig 



9.45364 and X= 1.110 



IcjmX =9.53614 



m = 0.312 at 39°.7 Fah. 



Upernavik, North Greenland. August 16, 1861. 



At flagstaflf. Chronometer 8' fast of Greenwich time. 



Set 1. Experiments of vibration. Temperature, 4'7°. 



Magnet Z P suspended. 







5" 15™ 



47» 



300 



5" 50" 



38=' 



34-" 



5P 





10 



16 



57 



310 



51 



47 



34 



50 



Observed time of 



20 



18 



06 



320 



52 



57 



34 



51 



300 vib'ns, =2091M7 



30 



19 



16 



330 



54 



07 



34 



51 



Time of one, 6.9706 



40 



20 



25 



340 



55 



17 



34 



52 





50 



21 



27 



35 

 24 



350 



200 



56 

 39 



27 

 01 



34 



52 





00 



34 



51.17 





Arc: 193 and 413 at 

 266 334 " 200 



282.5 318 " 350 vib's. 





 10 

 20 

 30 

 40 

 50 

 100 



gh QQm Qpa 

 01 10 



Set 2. Vibrations. Temperature, 47°. 



02 20 320 



03 29 330 



04 39 340 



05 49 350 

 11 37 200 



Arc: 194 and 399 at 



261.5 338 " 200 



300 

 310 



\ 6" 34"' 48^ 



35 58 



36 08 



38 17.5 



39 27 



40 37 

 23 12 



34"' 



48= 



34 



48 



34 



48 



34 



48.5 



34 



48 



34 



48 



34 



48.08 



Observed time of 

 300 vibrations, 2088^08 

 Time of one, 6.9603 



280 



320 " 350 vib's. 







10 

 20 

 30 

 40 

 50 

 100 



E. 

 W. 



7" 01-" 

 02 

 03 

 04 

 05 

 07 

 12 

 Arc: 192 



Set 3. 

 18' 

 27 

 36.5 

 46.5 

 56 

 06 

 53 



and 415 



300 

 310 

 320 

 330 

 340 

 350 

 200 

 at 



265 

 284.5 



333 

 315.5 



Vibrations." 



7" 35"' 

 36 

 37 

 38 

 39 

 40 

 24 

 



200 



350 vib's. 



Set 4. 



Temperature, 46°. 



09= 

 18.5 



28 

 37 

 47 

 57 

 32 



Deflections. 



34"- 



5P.0 



34 



51.5 



34 



51.5 



34 



50.5 



34 



51.0 



34 



51.0 



34 



51.08 



Observed time of 

 300 vibrations, 209P.08 

 Time of one, 6.9703 



Magnet Z 1 suspended, Z 6 deflecting. Distance 1 foot. 



E. 

 W. 

 E. 

 W. 



45° 



32' 



40 



352 



52 



40 



45 



23 



30 



352 



37 



50 



33' 40" 



53 20 



24 00 



38 30 



Mean 



48° 



47 

 46 



46.2 



2 it = 52° 40' 10" 



2 (( = 52 45 35 



u = 26 21 26 



* The correctness of the record is sustained by the resulting X. 



" The record of 300 to 350 vibrations is 1" too small, as appears plainly by comparing the times 

 of 0, 100, 200, and 300 vibrations. 



